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Nickel Oxide - NiO
Classification: Oxide
Atomic numbers: 28 & 16
Atomic weight: 64.69
Melting point (C): 2980
Boiling point (C):
Density (g/cm3): 6.4-5.8
Refractive index (n=): 2.18/2.23
Hardness (Mosh-scratch): 5.5
Crystal structure: Isometric-normal: (111) octahedron
Color (solid): Dark green
Cleavage: Cubic-poor: (001)